138322618 has 8 divisors (see below), whose sum is σ = 237124512. Its totient is φ = 59281116.

The previous prime is 138322607. The next prime is 138322619. The reversal of 138322618 is 816223831.

It is a happy number.

138322618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138322619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940080 + ... + 4940107.

It is an arithmetic number, because the mean of its divisors is an integer number (29640564).

Almost surely, 2^138322618 is an apocalyptic number.

138322618 is a deficient number, since it is larger than the sum of its proper divisors (98801894).

138322618 is an equidigital number, since it uses as much as digits as its factorization.

138322618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880196.

The product of its digits is 13824, while the sum is 34.

The square root of 138322618 is about 11761.0636423752. The cubic root of 138322618 is about 517.1673115092.

The spelling of 138322618 in words is "one hundred thirty-eight million, three hundred twenty-two thousand, six hundred eighteen".